baber/WOPTO huggingface dataset:
Patent GB-828562-A (GB)
Title: Improvements in "commercial power frequency cordless synchronous clock"
IPC: G04C15/00
Filed: 1957-04-26
Abstract: 828,562. Clocks. GENERAL ELECTRIC CO. April 26, 1957 [April 27, 1956], No. 13348/57. Addition to 819,992, Class 139 The clock disclosed in the parent Specification is modified by the provision in the amplifier of a non- linear stage serving to limit the output. The signal in pick-up coil 24, Fig. 1, is amplified by a transistor amplifier comprising first and second amplifying stages 26, 33, a non-linear transistor amplifier limiter stage 55 the output of which is substantially constant and an output stage 62 which drives a synchronous motor 80. In another embodiment, Fig. 5, the signal in ferrite cored pick-up coil 102 is amplified by amplifier 100 which locks the oscillatar 101 to a fixed frequency substantially equal to that of the commercial power supply. The oscillator drives the synchronous motor 80 even in the event of a supply failure. A capacitor type pickup device, Fig. 6, including a pre-amplifier transistor 143 and a coupling transformer 149 may be used instead of a magnetic coil pick-up device. In a further example, Fig. 7, the signal is amplified by a three stage amplifier 226, 233, 255 similar to that of Fig. 1, and connected to a frequency divider 270 which drives a step-by step motor 269 which through a pawl and ratchet mechanism drives a counting train having time indicating hands. Alternatively the pawl and ratchet mechanism may synchronize a spring driven gear train. The input signal may be produced by a generator comprising a coil wound round a laminated soft iron core.
Patent GB-991695-A (GB)
Title: Aerodynamic valve for regulating fluid flow
IPC: F16K13/00
Filed: 1964-04-01
Abstract: 991,695. Flow controlling devices. ANDRE CITROEN S. A. April 1,1964 [April 2,1963], No. 13354/64. Heading G3H. An aerodynamic valve consists of a tube 1 in which a plurality of frusto conical elements 2.... 5 are mounted in series, each frusto-conical element having its large end inscribed in the tube and its small end directed towards the large end of the following frusto-conical element, and the axis of said elements are inclined alternately to opposite sides of the tube axis. One generator line of each element may be parallel to the tube axis. The valve permits a free flow in the direction of the arrows, but greatly hinders any back flow.
Patent GB-995871-A (GB)
Title: Device for the automatic recognition of written or printed characters
IPC: G06V10/10
Filed: 1962-04-06
Abstract: 995, 871. Photo-electric investigation. STANDARD TELEPHONES & CABLES Ltd. April 6, 1962 [April 7, 1961], No. 13358/62. Heading G1A. [Also in Division G4] In apparatus for reading characters a potential field representing the character is created on a body of resistive material, there being means for determining potential gradients in the field and means for identifying the character from the gradients. The character, illuminated by a lamp, is imaged onto the plate 1, Fig. 1 of photo-conductive material by lens 4. Conductors 2 and 3 secured to opposite edges apply a voltage potential across it, the equipotential lines of which would normally be parallel to each other and to the conductors 2, 3. When the character image falls on the plate the potential lines are distorted as shown at P1-P4, Fig. 2, the line P1, if this is the most positive, being pushed down towards the negative conductor and the other lines crowded in consequence. The potential in the neighbourhood of the image is therefore higher than at positions on the same horizontal level remote from the image. A horizontal line of probes such as A1, A2, A3, Fig. 1 will detect, when the image is in the left hand position shown, three different potentials, the highest being at A1 nearest the image and the least at A3. As the moving image reaches the probe A1 it detects a maximum voltage and a further movement the voltage falls. The potential values on a line of three probes therefore indicate the position of the character image in that horizontal line. The potentials are sampled when the character image lies on the centre probe by making the circuit operative when the centre probe potential is a maximum or a certain predetermined value. In Fig. 3 a straight limb of the image over the middle probe gives the potential values a1, a2, a3 where a1 = a3 and both are less than a2. Where the limb of the image is a curve open to the left, as in Fig. 4, a2 is still highest but a1 is larger than a3. A reversed relationship results from a curve open to the right. Inside a closed loop the potential is uniform, Fig. 6, so that the potentials a1 and a2 are equal and greater than a3. In Fig. 1 there are three sets of probes each in a horizontal line and the values on each set are evaluated in circuits L.C. For a character "2" the top set A1-A3 will detect a curve open to the left and the bottom set C1-C3 a curve open to the right. The middle set may detect either element. The shape elements derived are combined in a recognition circuit to indicate on one of ten leads the character sensed. The character may alternatively be sensed while stationary. Specification 825,597 is referred to.
Patent GB-500724-A (GB)
Title: Angularly adjustable shaft coupling device
IPC: F02P5/02
Filed: 1937-05-13
Abstract: 500,724. Fuel-injection pumps. SCINTILLA, Ltd. May 13, 1937, No. 13534. Convention date, May 13, 1936. [Class 102 (i)] [Also in Groups XXIV, XXVII, XXIX, and XXXV] - An angularly adjustable shaftcoupling, particularly for automatically controlling the fuel-injection timing in a fuel-injection pump drive of an intemal-combustion engine, comprises a piston 21, adjusted axially by speed-responsive oil-pressure developed by a gear-wheel pump 18, 33, one wheel 18 of which is secured to the driving shaft 17 and is internally cylindrical to receive the piston 21. The piston 21 is feathered to turn with the driving shaft 17 and has serew-threaded engagement 27 with an axially-fixed sleeve 28 positively rotating with the driven shaft 1 by means of a toothed. coupling 29. Oil from a surrounding reservoir 30 reaches the inlet chamber 32 of the gear-wheel pump through an opening 31, and the pressurechamber 34 of the pump has direct access through a passage 35 to an annular chamber 26 above the working face ,of the piston 21 which is loaded upwardly by a spring 25. The pressure - chamber 34 also communicates with a spring-loaded relief-valve 36, having a throttle-passage 37. In order to lubricate the bearings of the gear 18, the shaft-member 28 is provided with an oil-slinging disc 48, having radial ducts 49, which create a pressure drop and draw oil from the reservoir 30 through a passage 50, lower bearing of the gear 18, lower pistonchamber 43 and passages 42, 40, 39, 44 in the piston 21 and shaft 17. In a similar manner, leakage-oil from the upper piston-chamber 26 is drawn over the upper bearing of the gear 18.
Patent GB-135868-A (GB)
IPC: F16B21/16
Abstract: 135,868. Hackett, W., and McPhee, J. Nov. 27, 1918, [Convention date]. Bolts; locking bolts. In order to secure a nutless bolt in position, a plate 16 is provided having a bayonet slot 17, 18 designed to pass over the bolt shank 10 and engage a cut-away portion 12 thereof. Feathers 14 at one end of these cut-away parts engage notches 19 in the plate to prevent relative lateral movement. When the bolt has been passed through the work A, B and the plate 16 inserted in place together with a washer or washers 15, a wedge 20 is driven in between the washer and the work to secure the whole in position. This wedge is split throughout part of its length to straddle the bolt and the maximum thickness is intermediate of the ends. The wedge is driven in until the point of maximum thickness is past the axial plane of the bolt so that it cannot slacken due to vibration.
Patent GB-711154-A (GB)
Title: Improvements in the colouration of mixed textile materials
IPC: D06P3/82
Filed: 1951-06-09
Abstract: In the dyeing or printing of textile materials comprising a mixture of cellulose and cellulose ester, e.g. cellulose acetate, fibres, solid shades are produced on both types of fibre by applying a composition comprising a vat dye, a vat dye leuco ester and thiourea dioxide, then heating the material, e.g. by steam, to approximately 100 DEG C., the vat dye being thus reduced to the acid leuco form and absorbed on the cellulose ester fibre and the vat dye leuco ester being unaffected and absorbed as such on the cellulose fibre, and finally oxidizing, e.g. with an aqueous sodium nitrite-sulphonic acid bath.  Two-colour effects may be obtained by employing a vat dye from which the leuco ester is prepared which is different from the vat dye used to colour the cellulose ester fibre.  In examples assistants present in the printing paste or dyeing solution are thiodiglycol, polyethyleneglycol, urea and ammonium thiocyanate.
Patent GB-1472793-A (GB)
Title: Pharmaceutical compositions
Inventor: GLEN JOHN B
IPC: A61K31/05
Filed: 1974-03-28
Abstract: 1472793 General anaesthetics IMPERIAL CHEMICAL INDUSTRIES Ltd 17 March 1975 [28 March 1974] 13739/74 Heading A5B. Sterile pharmaceutical compositions producing general anaesthesia comprise 2, 6-diisopropylphenol in association with a sterile pharmaceutically acceptable diluent or carrier, the compositions being suitable either directly or after dilution with a liquid diluent for parenteral administration to a warm-blooded animal. The compositions may be in the form of aqueous or non-aqueous compositions, solid or semi-solid mixtures, and oil-in-water emulsions. The compositions may also contain surfactants or other solubilising agents, additional solvents, stabilisers, preservatives, antioxidants, metal ion sequestering agents and/or antifoaming agents. The compositions may also contain another anaesthetic agent.
Patent GB-1179665-A (GB)
Title: Fibrous Web Forming Machine
IPC: D21F9/04
Filed: 1968-03-21
Abstract: 1,179,665. Rollers. BELOIT CORP. 21 March, 1968 [10 April, 1967], No. 13774/68. Heading F2U. [Also in Division D2] A paper &c. web-forming machine comprises a rotatable drum 1 provided with holes 3, 4 and 5 and covered with a foraminous wire 2, a vat 11 containing a slurry 12 of suspended fibres that are sucked on to wire 2 by a suction gland a in the drum to form a web W, a press roll 16 that presses water from the web which is sucked into a suction gland b in the drum, and an air cap 17 for blowing heated air against the web which is sucked through the web and into a suction gland c in the drum to dry the web. Glands a, b, c are defined by spokes 6 provided with seals 8 and springs 9. Spokes 6 may be fixed to a stationary seal plate of the drum, which plate may be connected to a vacuum pump. The other seal plate rotates with. the drum. Vat 11 includes a rectifier roll 14 and a weir 15. The web is removed from the drum on to a take-off roll 23 by an air shower 19, and a water shower 21 cleans the drum. In a modification, the drum is covered with a corrugated plate (25, Fig. 2) provided with holes (28) and a foraminous wire (26). Gland b may be combined with gland a or c, or omitted.
Patent GB-514530-A (GB)
Title: Improvements in or relating to gear cutting tools
IPC: B23F21/28
Filed: 1938-05-09
Abstract: 514,530. Milling cutters, NATIONAL BROACH & MACHINE CO. May 9, 1938, No. 13793. Convention date, May 10, 1937. [Class 83 (iii)] A gear finishing tool 10 of the rotary intermeshing type in which the teeth 11 have grooves or serrations 12 forming cutting edges for removing shavings from the work, the grooves or. serrations are wholly or partly converged inwardly to the base of the groove. In Fig. 3, which shows a section of the tooth. the end land 14 is preferably wider than the intermediate lands 15. The grooves have inwardly tapering side walls 16, 17, the cutting angle adjacent the land 14 being a right angle and the edge at the top of wall 16 being equal to a right angle plus the helical angle of the tooth. An acuteangled cutting-edge which is normally effective in one direction of cutting is thus avoided. The land thickness may be À026in. and the groove width - 053in. at the top and 029in. at the bottom, and the groove depth 050in. The helical angle and inclination of side wall 17 are each 27 degrees in this cutter. The width of land is increased and the width of groove decreased by grinding to sharpen the cutter. In a modification the acute angle is avoided by a chamfer 18 which may form either a right-angled or an obtuseangled cutting-edge. The chamfer is of sufficient width to provide for a number of regrinds of the tool. In another modification the side walls are inwardly inclined near the bottom of the groove to strengthen the land portions. In another modification the strengthening is effected by rounding off corners at the bottoms of the side walls. In a further modification, Fig. 7, this rounding off at 20 is combined with an inwardly tapered side wall 17. The roots of the teeth may be axially undercut as described in Specification 474,227, the oil stream when the cutter is in use serving to wash away cuttings through the undercut grooves. In manufacture the tool is first finished to shape, then the grooves are cut, the cutter heat-treated, and the lands finally finished by grinding. The Specification as open to inspection under Sect. 91 describes also a modification, Fig. 10 (Cancelled), in which the undercut is as shown at 13<1>. Other shapes of undercut may also be used. This subject-matter does not appear in the Specification as accepted.
Patent GB-560675-A (GB)
Title: Improvements in or relating to processes and apparatus for mixing liquids
IPC: C02F1/68
Filed: 1942-10-02
Abstract: 560,675. Mixing liquids. GOULDEN, J., and IMPERIAL CHEMICAL INDUSTRIES, Ltd. Oct. 2, 1942, No. 13842. [Class 86] A process for supplying small amounts of a liquid constituent uniformly and continuously to a stream of liquid comprises causing the stream to flow over one face of a porous diaphragm, the second face of which is in contact with the liquid constituent and maintaining a difference of pressure on the faces to cause the constituent to percolate through the diaphragm. The stream is driven along a main 3 by a pump 4. A branch pipe 6 contains an orificed plate 8 and leads to a chamber 5 having a porous carbon disc 23 in contact with liquid constituent in a chamber 1, a second orificed plate 11 being inserted in a pipe 7 returning the mixture to the main. Valves are provided to allow the chamber to be filled from the main, the substance to be added being supplied by a perforated pipe 16. The apparatus is suitable for chlorinating water or adding caustic soda to boiler feed water to adjust the pH value.
Patent GB-612135-A (GB)
Title: Pulse separator
IPC: H04J3/04
Filed: 1946-05-08
Abstract: 612,135. Cathode-ray tubes. STANDARD TELEPHONES & CABLES, Ltd. May 8, 1946, No. 13902. Convention date, May 14, 1945. [Class 39 (i)] [Also in Group XL (c)] In a pulse separator for use in a multiplex communication system, a desired series of 'pulses is selected from the train by modulating an electron beam with the pulse train and causing it to sweep across a pair of electrodes so that when the beam is modulated by a pulse of the desired series it is incident only upon a predetermined one of the electrodes. In Fig. 1, the first in each group of pulses in the train applied to the input has some discriminatory feature such' as increased duration so that it can be selected from the others of the group, for example by the width discriminator 12 and be used to synchronize the deflecting voltage applied to the deflecting plates 19, 20 of the cathode-ray tube. The cathode-ray tube is so biassed that it conducts only when pulses are present at the input. By adjustment of the bias voltage on the deflecting plate 20 when the electron beam is modulated with the pulses from the channel to be selected, it will have been deflected so that the electrons pass through the aperture 22 in barrier electrode 21 and impinge on the collector electrode 23, the signal derived therefrom appearing across resistor 27a. Signals from the remaining channels do not pass through the aperture and appear across resistor 27. Fig. 2 shows a barrier electrode having an aperture. 22 which selects the channel corresponding to the electron beam 34. The barrier electrode in Fig. 4 has an aperture 41 of such a width that two channels are selected. Fig. 5 shows a barrier electrode for use with a cathode-ray tube having a circular time-base sweep, the apertures 48, 49 selecting the channels corresponding to the electron beam at 341 and 361.
Patent GB-1528442-A (GB)
Title: Self-adjusting drum brake
IPC: F16D51/24
Filed: 1977-04-01
Abstract: 1528442 Automatic adjustment in drum brakes SOC ANON DBA 1 April 1977 [13 April 1976] 13904/77 Heading F2E A drum brake comprises two brake shoes, 12, 14, actuating means 22 in the form of an hydraulic wheel cylinder situated between two first adjacent ends 24, 26 of the shoes 12, 14, a fixed fulcrum block 28 situated between the other two ends 30, 32 of the shoes 12, 14, and adjusting means designed to increase the distance between the first ends 24, 26 of the shoes automatically as a function of the wear on the linings 16, 18 of the shoes 12, 14, the adjusting means comprising a lever 38 pivoted at one end on a first of said shoes 12 in the vicinity of the actuating means 22, a pawl 42 pivoted on said first shoe 12 and biased by resilient means 46 into engagement with a toothed sector 48 formed on the other end of the lever 38, and an operating member 50 in the form of a rod which is responsive to an increase in said distance between the first ends 24, 26 of the shoes 12, 14 so as to pivot the lever 38 in the direction corresponding to adjustment of the brake, wherein the resilient means comprise a spring of which at least part co-operates with that surface of the lever remote in the axial direction of the brake from the web of the first shoe irrespective of the position of the adjusting means. This prevents sector 48 excaping from pawl 42. As shown, spring 46 is a wire hairpin spring with at least one turn around the pivot of the pawl 42 and with first and second arms 62, 64 bearing respectively on shoe 12 and on pawl 42 so as to bias the pawl 42 into engagement with toothed sector 48-the second arm 64 includes a curved part constituting the part co-operating with the surface of the lever 38.
Patent GB-202403-A (GB)
Title: Improvements relating to selecting devices for telephone systems
IPC: H01H63/02
Filed: 1922-05-18
Abstract: 202,403. Siemens Bros. & Co., Ltd., Petithory, E. A., and Collyer, J. E. May 18, 1922. Automatic exchange selectors.-In a panel type selector the bank terminals are used -for holding a brush set in the desired position and for sending revertive impulses. As shown in Fig. 2, an insulated pawl 7 pivoted to the brush carriage engages the test terminals so as to support the carriage when it comes to rest. The tail 9 of the pawl opens and closes spring contacts 8 as the pawl passes over the terminals. A similar pawl (not shown) co-operates with additional terminals in the bank or with extensions of the appropriate line terminals so as to send an impulse for every group of (say) ten terminals. These additional terminals may be pivoted so as to be put out of engagement with the pawl if the number in a group is altered, or they may be arranged as shown in Fig. 7 on movable bars 19 so that this adjustment may be made in one operation for a number of selectors. Both pawls are disengaged by energization of a magnet 6. More than one terminal may take part in supporting the brush-carriage, and the supporting terminals may be thickened and shaped as shown in Fig. 4. In a modification, the carriage carries two wheels of hard insulating material and having ten teeth which engage with the bank terminals. The teeth in one wheel rock a lever so as to interrupt a spring set as each terminal is passed, and a pin on the other operates a similar lever so as to interrupt a second spring set for every ten terminals. A similar device for use as a group selector has only one wheel which has twenty-five teeth and causes an impulse to be sent once in each revolution.
Patent GB-145237-A (GB)
Title: Improvements in and relating to shoemakers' jacks
IPC: A43D5/02
Filed: 1919-06-04
Abstract: 145,237. Selfe. A. E. June 4, 1919. Last supports for hand work.-A last-support for hand work comprises a standard a the upper end of which engages a spring d, causing a ball e to engage frictionally the inturned upper end of a socket b screwing on to the standard. The ball has a neck to which is fixed a member g detachably carrying the last m., A slot is cut in the socket b to receive the neck when the last is in the position shown, rigidity being increased by a sleeve f slidable on the member g and secured in position by a set screw k so that its edge engages a slot s in the socket b. To bring the last horizontal the set-screw k is released, the sleeve f slid towards the last, the last forced to the horizontal position, and the sleeve f lowered to engage the upper edge of the socket b and clamped.
Patent GB-1162905-A (GB)
Title: Improvements relating to Monoazo Pigments and their use
IPC: C09B29/32
Filed: 1967-03-29
Abstract: 1,162,905. Monoazoacetoacetylarylamide pigments; printing lacquers. J. R. GEIGY A.G. 29 March, 1967 [30 March, 1966], No. 14217/67. Headings C4A and C4P. The invention comprises pigments of the general formula wherein X is Cl, Br, F or a C 1 -C 4  alkoxy group, and Y is Cl or Br. They are prepared by diazotization and coupling. Coupling may take place in presence of methanol and an ethylene oxide-stearyl alcohol addition product (mole ratio 20: 1). In Example 6, the pigment prepared from 1-amino-2-ethoxy-4-nitrobenzene and 2,5-dimethoxy-4-chloro-acetoacetanilide is admixed with linseed stand oils of 300 and 20 poise, Octa Soligen Cobalt and Octa Soligen Lead to form a printing lacquer.
Patent GB-1176653-A (GB)
Title: Improvements in Apparatus for Determining the Operating Temperature of Semi-Conductors.
Inventor: JONES BARRIE THOMAS
IPC: G06G7/62
Filed: 1966-04-01
Abstract: 1,176,653. Semi-conductor simulation. ENGLISH ELECTRIC CO. Ltd. 20 March, 1967 [1 April, 1966], No. 14468/66. Heading G4G. [Also in Division G1] An apparatus for assessing the temperature developed at any part of a semi-conductor device, such as a thyristor 2, under given operating conditions, incorporates a monitoring circuit 3, 8, for deriving a signal related to the power developed in the device, this signal being applied to an analogue circuit 15 providing an electrical simulation of the thermal characteristics of the component parts of the device. Signals are tapped from appropriate parts of the analogue circuit to indicate the temperatures at the corresponding parts of the device under the given conditions. To derive the signal related to the power developed in the thyristor 2 a similar device, viz, thyristor 5, is connected in series with it. A voltage corresponding to the current through thyristor 5, detected across the series resistor 4, is applied to the differential field windings 9 of a Hall effect multiplier, while the voltage across thyristor 5 is applied to the Hall plate of the multiplier. The plate output, represening power, is applied to amplifier 11, in turn connected to amplifier 12 whose output provides a current signal, proportional to the power, to a point 16 in the analogue circuit 15, This directly represents the thermal characteristics of the thyristor 5 and consequently simulates those of the thyristor 2. The analogue circuit representing the therma characteristics of the thyristor incorporates a resistor capacitor array simulating heat transfer paths in the thyristor. The point 16 to which the input current is supplied corresponds to the silicon junction of the thyristor, where the highest power dissipation occurs. The terminals 17, 18 and 19 represent the cathode lead, mounting base and heat sink of the thyristor respectively. The effect of ambient temperature is taken into account by applying a voltage from an energized potentiometer 21 to the circuit.